internal extern static uint IcmpSendEcho2(SafeCloseIcmpHandle icmpHandle, SafeWaitHandle Event, IntPtr apcRoutine, IntPtr apcContext, uint ipAddress, [In] SafeLocalAllocHandle data, ushort dataSize, ref IPOptions options, SafeLocalAllocHandle replyBuffer, uint replySize, uint timeout);
internal extern static uint Icmp6SendEcho2(SafeCloseIcmpHandle icmpHandle, IntPtr Event, IntPtr apcRoutine, IntPtr apcContext, byte[] sourceSocketAddress, byte[] destSocketAddress, [In] SafeLocalAllocHandle data, ushort dataSize, ref IPOptions options, SafeLocalAllocHandle replyBuffer, uint replySize, uint timeout);
internal static extern uint IcmpSendEcho2(SafeCloseIcmpHandle icmpHandle, SafeWaitHandle Event, IntPtr apcRoutine, IntPtr apcContext, uint ipAddress, [In] SafeLocalFree data, ushort dataSize, ref IPOptions options, SafeLocalFree replyBuffer, uint replySize, uint timeout);
private PingReply InternalSend(IPAddress address, byte[] buffer, int timeout, PingOptions options, bool async) { int num; PingReply reply; this.ipv6 = address.AddressFamily == AddressFamily.InterNetworkV6; this.sendSize = buffer.Length; if (!this.ipv6 && (this.handlePingV4 == null)) { this.handlePingV4 = UnsafeNetInfoNativeMethods.IcmpCreateFile(); if (this.handlePingV4.IsInvalid) { this.handlePingV4 = null; throw new Win32Exception(); } } else if (this.ipv6 && (this.handlePingV6 == null)) { this.handlePingV6 = UnsafeNetInfoNativeMethods.Icmp6CreateFile(); if (this.handlePingV6.IsInvalid) { this.handlePingV6 = null; throw new Win32Exception(); } } IPOptions options2 = new IPOptions(options); if (this.replyBuffer == null) { this.replyBuffer = SafeLocalFree.LocalAlloc(0x100ff); } try { if (async) { if (this.pingEvent == null) { this.pingEvent = new ManualResetEvent(false); } else { this.pingEvent.Reset(); } this.registeredWait = ThreadPool.RegisterWaitForSingleObject(this.pingEvent, new WaitOrTimerCallback(Ping.PingCallback), this, -1, true); } this.SetUnmanagedStructures(buffer); if (!this.ipv6) { if (async) { num = (int)UnsafeNetInfoNativeMethods.IcmpSendEcho2(this.handlePingV4, this.pingEvent.SafeWaitHandle, IntPtr.Zero, IntPtr.Zero, (uint)address.m_Address, this.requestBuffer, (ushort)buffer.Length, ref options2, this.replyBuffer, 0x100ff, (uint)timeout); } else { num = (int)UnsafeNetInfoNativeMethods.IcmpSendEcho2(this.handlePingV4, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, (uint)address.m_Address, this.requestBuffer, (ushort)buffer.Length, ref options2, this.replyBuffer, 0x100ff, (uint)timeout); } } else { SocketAddress address2 = new IPEndPoint(address, 0).Serialize(); byte[] sourceSocketAddress = new byte[0x1c]; if (async) { num = (int)UnsafeNetInfoNativeMethods.Icmp6SendEcho2(this.handlePingV6, this.pingEvent.SafeWaitHandle, IntPtr.Zero, IntPtr.Zero, sourceSocketAddress, address2.m_Buffer, this.requestBuffer, (ushort)buffer.Length, ref options2, this.replyBuffer, 0x100ff, (uint)timeout); } else { num = (int)UnsafeNetInfoNativeMethods.Icmp6SendEcho2(this.handlePingV6, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, sourceSocketAddress, address2.m_Buffer, this.requestBuffer, (ushort)buffer.Length, ref options2, this.replyBuffer, 0x100ff, (uint)timeout); } } } catch { this.UnregisterWaitHandle(); throw; } if (num == 0) { num = Marshal.GetLastWin32Error(); if (async && (num == 0x3e5L)) { return(null); } this.FreeUnmanagedStructures(); this.UnregisterWaitHandle(); if ((async || (num < 0x2afa)) || (num > 0x2b25)) { throw new Win32Exception(num); } return(new PingReply((IPStatus)num)); } if (async) { return(null); } this.FreeUnmanagedStructures(); if (this.ipv6) { Icmp6EchoReply reply2 = (Icmp6EchoReply)Marshal.PtrToStructure(this.replyBuffer.DangerousGetHandle(), typeof(Icmp6EchoReply)); reply = new PingReply(reply2, this.replyBuffer.DangerousGetHandle(), this.sendSize); } else { IcmpEchoReply reply3 = (IcmpEchoReply)Marshal.PtrToStructure(this.replyBuffer.DangerousGetHandle(), typeof(IcmpEchoReply)); reply = new PingReply(reply3); } GC.KeepAlive(this.replyBuffer); return(reply); }
internal static extern uint Icmp6SendEcho2(SafeCloseIcmpHandle icmpHandle, IntPtr Event, IntPtr apcRoutine, IntPtr apcContext, byte[] sourceSocketAddress, byte[] destSocketAddress, [In] SafeLocalFree data, ushort dataSize, ref IPOptions options, SafeLocalFree replyBuffer, uint replySize, uint timeout);
internal PingOptions(IPOptions options) { this.ttl = 0x80; this.ttl = options.ttl; this.dontFragment = (options.flags & 2) > 0; }
// internal method responsible for sending echo request on win2k and higher private PingReply InternalSend(IPAddress address, byte[] buffer, int timeout, PingOptions options, bool async) { ipv6 = (address.AddressFamily == AddressFamily.InterNetworkV6)?true:false; sendSize = buffer.Length; //get and cache correct handle if (!ipv6 && handlePingV4 == null) { handlePingV4 = UnsafeNetInfoNativeMethods.IcmpCreateFile(); if (handlePingV4.IsInvalid) { handlePingV4 = null; throw new Win32Exception(); // Gets last error } } else if (ipv6 && handlePingV6 == null) { handlePingV6 = UnsafeNetInfoNativeMethods.Icmp6CreateFile(); if (handlePingV6.IsInvalid) { handlePingV6 = null; throw new Win32Exception(); // Gets last error } } //setup the options IPOptions ipOptions = new IPOptions(options); //setup the reply buffer if (replyBuffer == null) { replyBuffer = SafeLocalFree.LocalAlloc(MaxUdpPacket); } //queue the event int error; try { if (async) { if (pingEvent == null) { pingEvent = new ManualResetEvent(false); } else { pingEvent.Reset(); } registeredWait = ThreadPool.RegisterWaitForSingleObject(pingEvent, new WaitOrTimerCallback(PingCallback), this, -1, true); } //Copy user dfata into the native world SetUnmanagedStructures(buffer); if (!ipv6) { if (async) { error = (int)UnsafeNetInfoNativeMethods.IcmpSendEcho2(handlePingV4, pingEvent.SafeWaitHandle, IntPtr.Zero, IntPtr.Zero, (uint)address.m_Address, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } else { error = (int)UnsafeNetInfoNativeMethods.IcmpSendEcho2(handlePingV4, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, (uint)address.m_Address, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } } else { IPEndPoint ep = new IPEndPoint(address, 0); SocketAddress remoteAddr = ep.Serialize(); byte[] sourceAddr = new byte[28]; if (async) { error = (int)UnsafeNetInfoNativeMethods.Icmp6SendEcho2(handlePingV6, pingEvent.SafeWaitHandle, IntPtr.Zero, IntPtr.Zero, sourceAddr, remoteAddr.m_Buffer, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } else { error = (int)UnsafeNetInfoNativeMethods.Icmp6SendEcho2(handlePingV6, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, sourceAddr, remoteAddr.m_Buffer, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } } } catch { UnregisterWaitHandle(); throw; } //need this if something is bogus. if (error == 0) { error = (int)Marshal.GetLastWin32Error(); // Only skip Async IO Pending error value if (async && error == UnsafeNclNativeMethods.ErrorCodes.ERROR_IO_PENDING) { return(null); // Expected async return value } // Cleanup FreeUnmanagedStructures(); UnregisterWaitHandle(); if (async || // No IPStatus async errors error < (int)IPStatus.DestinationNetworkUnreachable || // Min error > (int)IPStatus.DestinationScopeMismatch) // Max // Out of IPStatus range { throw new Win32Exception(error); } return(new PingReply((IPStatus)error)); // Synchronous IPStatus errors } if (async) { return(null); } FreeUnmanagedStructures(); //return the reply PingReply reply; if (ipv6) { Icmp6EchoReply icmp6Reply = (Icmp6EchoReply)Marshal.PtrToStructure(replyBuffer.DangerousGetHandle(), typeof(Icmp6EchoReply)); reply = new PingReply(icmp6Reply, replyBuffer.DangerousGetHandle(), sendSize); } else { IcmpEchoReply icmpReply = (IcmpEchoReply)Marshal.PtrToStructure(replyBuffer.DangerousGetHandle(), typeof(IcmpEchoReply)); reply = new PingReply(icmpReply); } // IcmpEchoReply still has an unsafe IntPtr reference into replybuffer // and replybuffer was being freed prematurely by the GC, causing AccessViolationExceptions. GC.KeepAlive(replyBuffer); return(reply); }
// internal method responsible for sending echo request on win2k and higher private PingReply InternalSend (IPAddress address, byte[] buffer, int timeout, PingOptions options, bool async) { ipv6 = (address.AddressFamily == AddressFamily.InterNetworkV6)?true:false; sendSize = buffer.Length; //get and cache correct handle if (!ipv6 && handlePingV4 == null) { handlePingV4 = UnsafeNetInfoNativeMethods.IcmpCreateFile (); if (handlePingV4.IsInvalid) { handlePingV4 = null; throw new Win32Exception(); // Gets last error } } else if (ipv6 && handlePingV6 == null) { handlePingV6 = UnsafeNetInfoNativeMethods.Icmp6CreateFile(); if (handlePingV6.IsInvalid) { handlePingV6 = null; throw new Win32Exception(); // Gets last error } } //setup the options IPOptions ipOptions = new IPOptions (options); //setup the reply buffer if (replyBuffer == null) { replyBuffer = SafeLocalFree.LocalAlloc (MaxUdpPacket); } //queue the event int error; try { if (async) { if (pingEvent == null) pingEvent = new ManualResetEvent (false); else pingEvent.Reset(); registeredWait = ThreadPool.RegisterWaitForSingleObject (pingEvent, new WaitOrTimerCallback (PingCallback), this, -1, true); } //Copy user dfata into the native world SetUnmanagedStructures (buffer); if (!ipv6) { if (async) { error = (int)UnsafeNetInfoNativeMethods.IcmpSendEcho2 (handlePingV4, pingEvent.SafeWaitHandle, IntPtr.Zero, IntPtr.Zero, (uint)address.m_Address, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } else{ error = (int)UnsafeNetInfoNativeMethods.IcmpSendEcho2 (handlePingV4, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, (uint)address.m_Address, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } } else { IPEndPoint ep = new IPEndPoint (address, 0); SocketAddress remoteAddr = ep.Serialize (); byte[] sourceAddr = new byte[28]; if(async){ error = (int)UnsafeNetInfoNativeMethods.Icmp6SendEcho2 (handlePingV6, pingEvent.SafeWaitHandle, IntPtr.Zero, IntPtr.Zero, sourceAddr, remoteAddr.m_Buffer, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } else{ error = (int)UnsafeNetInfoNativeMethods.Icmp6SendEcho2 (handlePingV6, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, sourceAddr, remoteAddr.m_Buffer, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } } } catch { UnregisterWaitHandle(); throw; } //need this if something is bogus. if (error == 0) { error = (int)Marshal.GetLastWin32Error(); // Only skip Async IO Pending error value if (async && error == UnsafeNclNativeMethods.ErrorCodes.ERROR_IO_PENDING) return null; // Expected async return value // Cleanup FreeUnmanagedStructures(); UnregisterWaitHandle(); if (async // No IPStatus async errors || error < (int)IPStatus.DestinationNetworkUnreachable // Min || error > (int)IPStatus.DestinationScopeMismatch) // Max // Out of IPStatus range throw new Win32Exception(error); return new PingReply((IPStatus)error); // Synchronous IPStatus errors } if (async) { return null; } FreeUnmanagedStructures (); //return the reply PingReply reply; if (ipv6) { Icmp6EchoReply icmp6Reply = (Icmp6EchoReply)Marshal.PtrToStructure(replyBuffer.DangerousGetHandle(), typeof(Icmp6EchoReply)); reply = new PingReply(icmp6Reply, replyBuffer.DangerousGetHandle(), sendSize); } else { IcmpEchoReply icmpReply = (IcmpEchoReply)Marshal.PtrToStructure(replyBuffer.DangerousGetHandle(), typeof(IcmpEchoReply)); reply = new PingReply(icmpReply); } // IcmpEchoReply still has an unsafe IntPtr reference into replybuffer // and replybuffer was being freed prematurely by the GC, causing AccessViolationExceptions. GC.KeepAlive(replyBuffer); return reply; }
internal PingOptions(IPOptions options) { this.ttl = 0x80; this.ttl = options.ttl; this.dontFragment = (options.flags & 2) > 0; }